Man TGA Construction with Reducer - Speedometer Not Working: FFR Error 3279 FMI 4, Speed Pulser

Hello. The problem concerns Mana TGA (construction with a reducer). The speedometer does not work and the error FFR 3279 FMI is displayed: 4. So far, I have replaced the speed pulser and checked the beam from the pulser to the cabin. And the speedometer still doesn't work. What can I do more? What to check

It looks like you still have no signal from the pulser.

I know that much.

Find a friend Krisbrumm in the forum and ask, he is good at these blocks, I recommend.

Check the fuses in the cabin and those in the battery compartment, you need to check the harness from the pulser to the tacha at the back, at first pull out the tacho and see if the plug is unplugged.
if there is still no reaction - the beam to check - tacho - clocks - ffr.

Hello, gentlemen, I would like to attach to this post, the case looks similar With the error that only lights up at a standstill while driving, the clocks work normally and additionally every hour the message is displayed on the tachograph, the message is damaged transmitter error 20
Thank you in advance for any suggestions, best regards

Added after 20 [minutes]:

The patient is TGM 2008

Pull out the pulser and see if there are any filings on it. Clean it and see if it got better.

kakibara wrote:

Pull out the pulser and see if there are any filings on it. Clean it and see if it got better.

That's what I did Impulsator. In fact, it was stuck with such a slime as if I wiped off the grease, I twisted the improvement

So you need to check the harness and the pulse generator.

I found one more error in EBS 03068-08
Well, I guess I'll have to give it to some workshop

The pulsator replaced with a new problem is still the same, i.e. the beam remains or someone can tell you how to quickly and efficiently check it or maybe Someone knows where they are most often damaged, thank you and best regards

Or some hint if it goes in one conduit with the entire installation or it is a separate cable

You have a description of the pins on the tachograph. You need to check the beam by pulling the halogen bulb from the generator side, connect all cables to ground and from the tachograph side connect the bulb to + 24V and with the other end check the 4 cables going to the previously massed generator connector. On the cable where the bulb does not light, you have a break.

Usually the cable breaks under the cabin in the picture behind the servo oil tank. Second place, first meter behind the impulse.

Thanks for any hints I will work
I am concerned that the error is not permanent, but only activates at a standstill

Added after 1 [hours] 38 [minutes]:

I have one more question because I followed the old trail as I used to go crazy when my abs went crazy, i.e. I took the bumper apart. and I opened the conduit as then and today there was a lot of water, or if the short circuit was made by water in the conduit, after drying the cables and checking for damage, the defect will disappear or you need to remove a computer error or take a car to get it right

The error may disappear after a short route when the system tests the abs.

kakibara wrote:

The error may disappear after a short route when the system tests the abs.

I gave this ABS only for example because in the same conduit I found a wire that goes to the pulser and it was actually over the gnity I threw some rotten and turned to check if it did something and by bridging the wires at the pulser and under the hood checking the meter, the passage on the wires is but on on the board, the error still appears and hence my question whether to look for the cause further or just how the system must test

I soldered the wire, I checked the beam as my colleague STANISŁAWPIOTR wrote on each, the bulb lights up and the error on the board as it was so, where else to look, what to do

And did you check the wiring harness for punctures? If not, try checking the beam this way. Power the test bulb through one of the wires and leave the other wires disconnected. Then connect the device with one end to the ground and with the positive one, check the other wires for voltage, using the lower and lower range, perform such a test on each wire separately. If there is no voltage on other cables, repeat the measurement after washing the car. If the beam is ok, even a slight voltage should not penetrate between the wires. If you still do not detect the fault and the problem persists, you need to substitute a new cable. If this does not help, the tachograph can be suspected.

Does it matter that before replacing the pulser on the tachograph, the transmitter failure code 20 was displayed after a failed attempt to pair a new pulser
I screwed on the old pulser and the tachograph showed code 23 interruption instead of the above-mentioned one
The display shows the code as in the description of the post
Connecting the computer displays it as a permanent error

And who paired your tachograph with the pulser?

The guy who does legalization of tachographs
I have not checked for punctures, I will replace these 4 veins for the sake of peace, what is new is new, the more that water collects in the conduit through which these cables go

A good decision, write about the effects.

I replaced the cables with a new one, the error is still there, but after re-testing everything returned to normal, the errors disappeared
Thank you to everyone involved for taking the time and giving hints on what to do where to look, thank you again and a lot of health.